<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

<form action="/params" method="POST">
    用户名：<input type="text" name="user_name"/> </br>
    密 码：<input type="password" name="password"/> </br>
    年 龄：<input type="number" name="age"/> </br>

    <button type="submit">提 交</button>
</form>

</body>
</html>